The wrestler first developed a fever on April 4, but struggled to seek treatment at the hospital due to a deluge of similar complaints from other potential patients.
After being turned away by a few hospitals, Shobushi was only admitted to the hospital on April 8.
He had been in intensive care since April 19, but his condition deteriorated and he died on Wednesday.
“He fought tenaciously against the disease, enduring pain and suffering for more than a month as a sumo wrestler,” the Japanese Sumo Association said in a statement on Wednesday.
“We hope he will rest in peace now. We are very grateful to all of those medical institutes who have treated him with the utmost care.”
Shobushi made his professional debut in 2007 and reached No. 11 in the Sandanme division.
The wrestler belonged to the Takadagawa stable and participated in the seventh division of sumo. There are eleven divisions in all.
Last month, Takadagawa stable master – a trainer of sumo wrestlers – also tested positive for the coronavirus. So far, six members of the sumo association have been diagnosed with the virus.
The sumo association held its annual March tournament without spectators after the Japanese government requested the cancellation of major sporting events.
Earlier this month, the sumo association canceled the Summer Grand Sumo tournament and changed the location of its July 2020 tournament. It will now take place at the Ryogoku Kokugikan in Tokyo behind closed doors.